patch-1.3.71 linux/arch/sparc/prom/devtree.c

• Lines: 115
• Date: Mon Mar 4 08:49:58 1996
• Orig file: v1.3.70/linux/arch/sparc/prom/devtree.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.70/linux/arch/sparc/prom/devtree.c linux/arch/sparc/prom/devtree.c
@@ -0,0 +1,114 @@
+/* devtree.c: Build a copy of the prom device tree in kernel
+ *            memory for easier access and cleaner interface.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+
+/* Add more as appropriate. */
+enum bus_t {
+	OBIO_BUS,
+	SBUS_BUS,
+	PCI_BUS,
+	PMEM_BUS,
+	CPU_BUS,
+};
+
+struct sdevmapping {
+	unsigned long physpage;
+	int mapsz;
+	enum bus_t where;
+};
+
+/* limitation of sparc arch. */
+#define NUM_SPARC_IRQS    15
+
+struct sdev_irqs {
+	int level;
+	int vector; /* For vme/sbus irq sharing methinks. */
+};
+
+struct sparcdev {
+	struct sparcdev *next;
+	struct sparcdev *prev;
+	int node;
+	char *name;
+	int num_mappings;
+	struct sdevmapping *maps;
+	int num_irqs;
+	struct sdev_irqs irqinfo[NUM_SPARC_IRQS];
+};
+
+struct sparcbus {
+	struct sparcbus *next;
+	enum bus_t type;
+	struct sparcdev *device_list;
+};
+
+/* Add more as appropriate. */
+struct sparcbus obiobus_info = { 0, OBIO_BUS, { 0, 0}, };
+struct sparcbus sbusbus_info = { 0, SBUS_BUS, { 0, 0}, };
+struct sparcbus pcibus_info = { 0, PCI_BUS, { 0, 0}, };
+struct sparcbus pmembus_info = { 0, PMEM_BUS, { 0, 0}, };
+struct sparcbus cpubus_info = { 0, CPU_BUS, { 0, 0}, };
+
+struct sparcbus *sparcbus_list = 0;
+
+/* This is called at boot time to build the prom device tree. */
+int prom_build_devtree(unsigned long start_mem, unsigned long end_mem)
+{
+}
+
+/* Search the bus device list for a device which matches one of the
+ * names in NAME_VECTOR which is an array or NUM_NAMES strings, given
+ * the passed BUSTYPE.  Return ptr to the matching sparcdev structure
+ * or NULL if no matches found.
+ */
+struct sparcdev *prom_find_dev_on_bus(bus_t bustype, char **name_vector, int num_names)
+{
+	struct sparcdev *sdp;
+	struct sparcbus *thebus;
+	int niter;
+
+	if(!num_names)
+		return 0;
+
+	if(!sparcbus_list) {
+		prom_printf("prom_find_dev_on_bus: Device list not initted yet!\n");
+		prom_halt();
+	}
+
+	while(thebus = sparcbus_list; thebus; thebus = thebus->next)
+		if(thebus->type == bustype)
+			break;
+	if(!thebus || !thebus->device_list)
+		return 0;
+
+	for(sdp = thebus->device_list; sdp; sdp = sdp->next) {
+		for(niter = 0; niter < num_names; niter++)
+			if(!strcmp(sdp->name, name_vector[niter]))
+				break;
+	}
+	return sdp;
+}
+
+/* Continue searching on a device list, starting at START_DEV for the next
+ * instance whose name matches one of the elements of NAME_VECTOR which is
+ * of length NUM_NAMES.
+ */
+struct sparcdev *prom_find_next_dev(struct sparcdev *start_dev, char **name_vector, int num_names)
+{
+	struct sparcdev *sdp;
+	int niter;
+
+	if(!start_dev->next || !num_names)
+		return 0;
+	for(sdp = start_dev->next; sdp; sdp = sdp->next) {
+		for(niter = 0; niter < num_names; niter++)
+			if(!strcmp(sdp->name, name_vector[niter]))
+				break;
+	}
+	return sdp;
+}